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October 21, 2014

October 21, 2014

Posted by **nicky** on Friday, September 5, 2008 at 4:51pm.

The approximate time in seconds, that it takes an object to fall d feet under the influence of gravity is given by mathematical model t=square root d/16. A rock dropped from a cliff hits the ground 6 seconds later. How high is the cliff?

- Algebra -
**Reiny**, Friday, September 5, 2008 at 5:33pmor rearranged

distance fallen = 16 t^2

so if t=6

dist = 16(36) = 576

so the cliff is 576 feet high

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